class_docstr: NameManager to do automatic naming.
  
  Developers can also inherit from this class to change naming behavior.
code: def __exit__(self, ptype, value, trace):
      _current.set(self._old_manager)
  
file_path: mxnet/python/mxnet/name.py
imports: import contextvars
label_desc: Use image node_id 4 for calling the NameManager obj's underlying member method code with example usage: obj.__exit__(ptype, value, trace) without return types